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松辽盆地含油岩系中泥岩碎屑高岭石的分布主要受古气候性质和沉积环境水动力条件的影响。碎屑高岭石分布在纵向上的变化,反映了沉积过程中古气候性质和沉积环境水动力条件的旋回性变化。因此,可以用碎屑高岭石分布在纵向上的旋回性变化特征进行地层的旋回对比。其对比结果与用介形类标志化石的分层对比结果一致。这是因为介形类标志化石的纵向演变受水体盐度变化的控制,同样是受古气候和沉积环境的影响。在陆相地层,特别是坡积相和河流相的沉积,岩性和电性在横向上变化很大,又缺乏生物标志化石,往往给地层对比带来困难。上述方法为这些地区的地层对比提供了一种有效的对比指标。
The distribution of shale clastic kaolinite in the oil-bearing rock series of the Songliao Basin is mainly influenced by paleoclimate properties and sedimentary hydrodynamic conditions. The variation of clastic kaolinite distribution in the longitudinal direction reflects the cyclonic nature of the sedimentary process and the cyclonic changes of sedimentary hydrodynamic conditions. Therefore, the stratigraphic cyclonic contrast can be compared with the cyclical variation of clastic kaolinite distribution in the longitudinal direction. The comparison result is consistent with the hierarchical comparison of the fossils marked by the ostracods. This is because the longitudinal evolution of the ostracod fossils is controlled by changes in the salinity of the water bodies as well as by the paleoclimatic and sedimentary environments. In the terrestrial strata, especially the sedimentary facies and fluvial facies, lithology and electrical properties vary greatly in the horizontal direction, and the lack of biomarkers fossils often cause difficulties in stratigraphic comparisons. The above method provides an effective contrast indicator for stratigraphic correlation in these areas.